Typewriting machine



July 21, 1925.

Y J. WALDHEIM TYPEWRITING MACHINE 3 Sheets-Sheet 1 Filed June 21, 1921INVENTUR July zfflfszs;

J. WALDHEIM TYPEWRITING MACHINE 3 Sheets-Sheet 2 Filed June 21, 1921lNvENTnig July 21, 1925.

J. WALDHEIM TYPEWRITII IG MACHINE Filed June 21, 1921 3 Sheets-Sheet 5INVENTUR m, H15 ATTUR Patented July 21, 1925.

UNITED STATES PATENT OFFICE.

JOHN W'ALDHEIM, OF ELIZABETH, NEW JERSEY, ASSIGNOR TO UNDERWOOD TYPE-WRITER COMPANY, OF NEW YORK, N. Y., A CORPORATION OF DELAWARE.

TYPEVJEETING MACHINE.

Application filed June-21, 1921. Serial No. 479,190.

To all whom it may concern:

Be it known that I, JOHN \Vnnonnmr, a citizen of the United States,residing in Elizabeth, in the county of Union and State of NewJersey,.have invented certain new and useful Improvements in TypewritingMachines, of which the following is a specification.

This invention relates to sound-deadening devices for typewritingmachines. The invention is of the same general type as that .disclosedin the co-pending application of B. C. Stickney, Serial No. 429,617.filed Dccember 10, 1920 (now Patent No. 1,519,224,

dated December 16, 1924), and comprises a sound-deadening casing or hoodfor enclosing the noise-producing parts of a typewriting machine, whilethe keys and other parts of the machine used in its operation projectfrom the casing or hood.

The casing is so constructed that it can he slid upon a typewritingmachine from the front thereof, the front of the machine entering therear of the casing, which, for this purpose, is provided with a large insertion opening. Vhen the machine is completely within the casing, therear opening of the latter is closed, thus completely en closing themachine, to prevent the escape of sound.

A feature of this invention lies in the novel, simple, and effectiveclosure means for the opening in the rear wall of the easing, said meansbeing in the form of a door mounted so that it may be readily swung toopen position to permit the casing to be ap plied to the machine andlocked in closed position.

Another feature of this invention is the construction ofa front wall of.the casing to cover almost completely the front plate of thetypewriting machine, and thus avoid the necessity of providingsound-deadening means for said front plate in addition to said frontwall. For this purpose, the front wall of the casing is provided with anopening just large enough to permit the forward extension of thetypewriter frame. in which are mounted the banks of keys, or, in otherwords, the keyboard section of the machine, to project therethrough.

A further feature of this invention is the construction of the frontwall of the easing, so that said wall may he brought flush against thefront plate of the typewriting machine without removing the ribbon-colorshift-key. For this purpose, a hole is provided in the front wall of thecasing large enough to clear the-ribbon-color shift-key.

.Provision is made for a slot at the front of the casing, through whichvarious operating levers and finger-pieces, such as the line-spacehandle, carriage-return fingerpiece, and carriage-release-lever extend,so that the machine may be operated from outside of the casing. Meansare provided for closing all of the slot not occupied by the levers andfinger-pieces, in order to prevent the escape of sound, said meanscomprising cooperating cushions in the form of folds of sound-deadeningmaterial. It is a feature of this invention to provide means to increasethe resiliency of the folds of sounddeadening material to cause them toreturn readily, said means comprising reinforcing layers of horse-hairas backings or linings for the folds.

Other features and advantages will hereinafter appear.

In the accompanying drawings,

Figure 1 is a front view of the sounddeadening casing forming thesubject of this invention, applied to an Underwood standard typewritingmachine.

Figure 2 is a perspective view from the rear, showing the closure meansfor the opening in the rear wall.

Figure 3 is a detail of a cushion, comprising a fold of sound-deadeningmaterial used for closing the front slot and a backing of horse-hair forsaid material for increasing the resiliency of the material.

Figure 4-. is a side view, vertically sectioned, of the device, as shownin Figure 1.

.Figure 5 is a plan view of the device as shown in Figure 1, the coverhaving been removed to display the interior of the easing.

The Underwood standard typewriting machine comprises a main frame and aforward extension 11 of the main frame, in which are positioned banks ofkeys 12, said keys, when depressed, operating type-bars 13 to causetypes 14 carried thereby to strike against a platen 15 at the printingpoint. Said platen is fixed upon a shaft or axle 16, journaled in theend walls 17 of a platenframe 18, mounted in acarriage 20 havingletter-feeding movement on a front rail (not shown) and a rear rail 21fixed to the r m and a cover part 41.

anism by a carriage-release-lever 31.

ill or deadening the sounds arising-inthe operation, there isprovided asound deadening casing or'hood comprisinga body The body 4:0 comprisesafront wall42,-side walls 43, and a rear wall in the form of two endsections d4, spacedapartto provide a large opening l l 'sufficient toperinit passage of the type- Writingmachine therethrough and into thebody part ofthecasing, said rear wall being of greater height than theheight of the ,t-ypewriting machine. rissuming that the .typewriti11gmachine rests upon a base, such as 50, the casingor-hood' may he slidalong the base and ontothe Inachine'from the front thereof, asin myapplication, Serial No. 478,231, filed June 17, 1921. The cover l1 .isatthis time raised sufficiently to :clear the line-space lever 26, theforward extension 11- ofthe ,typewriting machine entering the rear ofthe casing through the opening in .between end sections ed, and thecasing being moved rearwardly until the front of the main framelOcontacts withxpositioning abutment s '51 fixed to the front wall 42, the

forward extension 11 projecting through an opening 52 in the front wall42. Said open-' ing 52 is just large enough tofpermit the forwardextension of the typewriter frame to project therethrough, the frontwall of the casing covering substantially allof the remaining portion ofthe usual frontplate 52 of the typewriter frame, thus avoiding thenecessity-of linin'g'with a sound-deadening material the front plate,which is usually of thin metal capable of transmitting sounds.

Provision is, however, made of sound-deadening material in the form ofasheet 42 between the front plate 52 of the typewriterframe and thefront wall 42 0f the casing.

' salid sheet 4:2' may be attached to the rear face of the front wall 42to serve as a lining therefor. l 'l Toperinit the ribbon-color shift-key53 to project outside -ofthe casing at the front thereof, the-front wall42 isprovided with- .an opening '54; large enough to permit the entireshift-key -to'project therethrough. Hitherto, it has been necessary withhoods, in which the front plate is integral with the casing, to removethe ribbon-color shift-hey from its shaft when the casing was to be i:applied, and again attach it to the end of the shaft after applying thecasing, the shaft pro ecting through a small hole in the front and left.

wall. The opening 54 thus avoids the neces sity of removing theshift-key when the casing is applied. An opening 55 is provided inthe'frontwall 42, through which the linelock release-key 56 pr jects andmay be operated from outside the casing.

It will thus be see-n that, when the typewriting machine is positionedwithin the body-part of the casing, the forward eaten sion or keyboardsection 11, the ribbon-color shift-key, and the line-lockrelease-keyproject outside of the casing. The body part is provided withextensions 60, above which the typewritercarriage operates to the rightThemachine is thus enclosed at all times by thebody part at the frontand sides thereof, but is open at the top and rear. To

close the top opening, there is providedthe cover ll hinged to the endsections 44 of the body part by means of a bolt, or rod, 61 passingthrough alternately arranged turnedover ends 62 and 63 of a rear wall 6%of the cover and the endsections id, respectively. lhe cover is thushinged to the body part only near its ends, the lower edge of the rearwall 6 of the cover forming the upper edge of the rear wallof the bodypart between the end sections 44; The cover comprises a top wall orceiling 65 extending forwardly and downwardly toward the front of thecasing, side walls 66 provided with fla-ngesb? which rest upon ledges 68of e:;- tensions 60, said ledges 68 being pr vide-d with embedded strips69 of sound-deadening material, such as felt, and afrontwall 70, whichmay be separate or formed integral with the other walls of the cover.For permitting the typewriting at the interior of the casing to beviewed when the cover is in lowered position, the top wall is providedwith a. transparent plate 71 suitably held, as 7 lVhen the cover is inclosed or lowered position, there is still an opening or slot betweenthe lower edge of the front wall and the upper edge of front wallthrough which slot project the lineespace handle 26, carriagereturnlinger-piece 30', and carriagerelease-lever 31, so'as to permit ordinaryoperation of the macaine without raising the cover. It is necessary,however, toclose all of the slot not actually occupied by thesefinger-pieces or levers, in order to prevent transmission of soundsthere through. For this purpose, two co-operat- 'ing cushions 7 1- and75 are provided, said cushions comprising folds of sound-deadeningmaterial, such as plush, felt, or soft leather, the two-ply'edges ofeach fold being clamped between two bars 76-and 77, fastener together bybolts 77 to form single units which are mounted on the lower edge offront wall 70 and upper edge of front wall respectively by screws FTpassing through holes 77 so that the folds contact. It has been founddesirable to increase the resiliency of the cushions so as to return tonormal more readily when distorted by the passage or operation of thevarious fingerpieces and levers. For this purpose, the folds ofsound-deadening material are each backed or lined with a layer ofmaterial 78 composed of horse-hair (see Figure 3), the edges of whichare clamped with the edges of the folds of the cushions between the bars76 and 77.

The typewriting machine is thus completely enclosed at the front, sides,and top, but there still remains the insertion opening at the rearbetween end sections 44, the base 50 and the lower edge of wall 64,through which opening the machine entered the caing. For closing thisopening, there is provided a closure member or door in the form of acover-plate 80, having turned-over end members 81 forming bearings whichare alternately arranged with the similar end members 63 of the cover,the rod 61 passing through members 62, 63 and 81 to hinge the cover tothe body and to hinge the coverplate to the cover part. The height ofthe cover-plate is the distance from the base to the hinge, and itswidth is greater than the width of the opening, so that it overlies theend sections 44. To lock the cover-plate in lowered position, there isprovided a catch 85 adjacent each side edge of the cover-plate andengaging in a slot 86 in the underlying end section 44, said catch beingwithdrawable from said slot when slid upwardly by means of afinger-piece 87 on a bolt 88, to which said catch is fixed, said boltbeing guided in its movements by brackets 89 fixed to the cover-plate,the upward movement of the bolts being limited by projections 88 whichengage the lower brackets 89. The cover-plate carries abutments 90,which, together with the abutments 51, hold the machine against movementwithin the casing, the machine having been previously positioned withinthe casing by abutments 51.

The sound-deadening casing, as described above, is preferably of metal,such as iron,

and the main metallic parts thereof may be formed in three sections,that is, cover, body part, and cover-plate. Each section may be built upor cast to form a unit. To support the casing more firmly on the base,the body part may have inturned flanges 91 at the lower ends of thewalls, and preferably formed integral with the walls.

It will be understood that, by hinging the cover-plate on the casing, itmay readily be swung into closing position, and the necessity oflocating it relatively to the casing and the possibility of its becomingmisplaced, which may be experienced with a detachable cover-plate suchas shown in my application, Serial No, 478,231, above referred to,

and in my application Serial No. 466,820, filed May 4, 1921 (now PatentNo. 1,519,645, dated December 16, 1924), are thus eliminated.

The casing may be lined with any suitable sound-deadening material, suchas felt.

Variations may be resorted to within the scope of the invention, andportions of the improvements may be used without others.

Having thus described my invention, I claim:

1. A sound-deadening casing for a typewritingmachine having a keyboardextension and a forwardlyextending key above said keyboard extension,said casing having at its front an opening just large enough to receivesaid extension, a second opening to receive said key and locating meansto engage the front of the machine and assist in positioning the same inthe casing, said casing also having an opening in its rear to re ceivethe typewriting machine therethrough into position with the extensionprojecting through the front opening, and a door hinged at its upperedge to the casing proper for closing the rear opening and pressing themachine against said locating means, to cause the front of the machinearound said key to co-operate with the front of the casing to preventthe escape of sound through the corresponding opening in the casing.

2. A sound-deadening casing for a typewriting machine, said casingcomprising a body portion having side members fixed thereto and providedwith overhanging lateral extensions to accommodate the travel of thetypewriter-carriage, said side members being spaced apart at the rear toprovide an opening of sutiicient width to permit the passage of themachine therethrough, a cover hinged at its rear edge on said sidemembers at such a height as to permit the passage of the machinethereunder, and a door to close the rear opening of the body portion,said door being hinged to said side members to swing about the same axisas said co'ver 3. A sound-deadening casing for a typewriting machinehaving a keyboard extension, said casing comprising a body part, acover, said body part comprising a front wall of unitary constructionhaving an opening extending upwardly from the lower margin of said wallbut large enough to permit said extension to be passed therethrough,locating means to engage the front of the machine and a rear wall formedby two laterally-spaced end sections, the space between the end sectionsbeing sufiicient to permit the passage of the typewriting machinetherethrough and into said casing, said end sec tions having bearingmembers formed on their upper edges, a door for the opening in said rearwall, said door having bearing members at regular intervals, bearingmembers formed on said cover at regular inter- *"enou'ghto permit thepassage of said keyboard extension, a rear wall formed bytwolaterally-spaced end sections, the spacebetween the end sections -beingsufficient to permit'the passage of the typewriting' machinetherethrough and into said casing,

"said cover being hingedat the rear to said 7 end sections, adoor hingedat its upper edge to said casing for closingthe space be-.

tween said end sections, said door overly- -'ing'said end sections,-and'means for locking *said door inyclosd position comprising a latch ateach side of said door, each of said end sections having an openingthrough which the respective latch passes to engage the body:part,'saidlatches being shiftable torelease'the'door.

5. In combination, a sound-deadening casing,'a'typewritingmachine havinga keyboard extension and fitted within said casing, said machinecomprising a body from which a shaft projects forwardly, an en largedfinger-piece on the front of said shaft, said casing having afiXed frontwall of unitary construction coveringthe front of the machine bodyand'provided in its lower portion with an opening through which saidkeyboard extension is passed from the rear 7 and anopening to permitsaid finger-piece to project therethrough'as the machine is inserted inthe casing from the rear of the latter, sound-deadening material betweenthe machine and the front wall of the casing to close the openingbetween said machine fand'the edges of the opening in said front wallaround said finger-piece, said casing having a rear 'wallhavin'g aninsertion'opening of sufficient size to receive the machine, 'a'door forsaid insertion opening, and locating means movable to engage and locatethe machine in proper relation with said front wall of the casing.

6. A sound-deadening casing,'a typewri'ting machine having a keyboardextension and "also having a front plate above said extenysion, and alsohaving a ribbon-color shift- 'key and a line lock'release-key at thefront of said front plate, said casing having a fixed front wall ofunitary construction abovefithe keyboard and forward of said front plateand provided with an opening just large enough to receive said keyboardextension when inserted from the rear, and also provided with openingsto accommo- "date the ribbon-color shift-key and thelinelockrelease-key,.. and sound-deadening material between said frontplateof the machine and'the front wall of the casingto close theopenings between the frontr'plate such insertion, said casing alsohaving'an insertion openingin its rear wall large enough to permit thepassage of the machine, a door for said insertion opening hinged atritsupper edge to the casing proper, and a cover for the casing co-operatingat its forward edge with the upper edge'of the front wall to provide aslot along which said fingerpiece may travel with the carriage andswingable upwardly to permit the insertion of the finger-piece into saidslot when the machine is inserted into the casingfrom the rear, saidcover being mounted on the easing so as to swing about the same axis assaid door. 7

8. A sound-deadening casing for a typewriting machine'having a keyboardextension and a forwardlyprojecting key therei above, said casingcomprising a front wall and a rear wall, said front wall having anopening to furnish a close fit for said-extension and an openingto-receive said key,

and said rearwall having an opening to permit the machine to beinsertedinto the casing from the rear, and 'the extension and the key tobe passed through the openings in the front wall, abutments on the frontwall to engagethe machine to locate the c'as-i ing and themachlnerelatively to each other,

a pivoted door to close the opening in the rear wall, abutments carriedby said pivoted door to oppose the abutments on the front wall and clampthe machine in 'posi tion in said casing, and latching means to locksaid door in closed position.

9. A 'sounddeadening casing for a typewriting machine having at itsfront akey movable in a vertical plane parallel to the" front of themachine. said asing comprising a front wall integralwith said casing andhaving an opening to clear the keyboard section of the machine, aseparate openingto clear said key .to avoid interference inassemblingthe machine and'casin and a lining of sound-deadening'material to oo-operate with the-front of said machine around saidopenings to assist in deadening-the sound.

10. In a casing for a typewrit-ing machine, including a frame and akeyboard, the combination of a body-part and a cover, the body-parthaving a front wall with an opening therein to permit the passage of thekeyboard therethrough, and having a rear all with an opening therein topermit the passage of the typewriting machine there through, a swingabledoor arranged to close said rear opening, and co-operating oppo ed,clamping means mounted on the front wall and on said swingable door toengage said machine and clamp it into operative location in said casing.

11. A sound-deadening casing for a type writing machine having akeyboard-extcnsion, said casing comprising a body-part having a frontwall of unitary construction, with an opening, extending downwardly below the top margin of said front wall, large enough to receive saidextension. and locating means to engage the front of the machine andassist in positioning said machine in the casing, said casing alsohaving F11 opening in its rear to permit the passage of the typewritingmachine therethrough into said casing with the extension of said machineoperably projecting through the opening in said front wall, a door beingpivoted near its top to the casing-body arranged to close the rearopening of the casing, press against the machine-frame and locate saidmachine in the casing, and a cover being hinged to said casing above theheight of' the typewriting machine, arranged to swing about the sameaxis as the door, to give access to work in the machine.

12. In a casing for a typewriting machine, including a frame and akeyboard, the combination of a bod -part and a cover, the body-parthaving a front wall with an opening arranged to permit the keyboard tobe passed therethrough, and having sitle walls, each of which isprovided at its upper portion with an outwardly-disposed lateralextension, aranged to permit the travel of a typewriter-carriage thereinin its opposite extreme positions, the cover being swingably mounted onsaid side walls and arranged to close the top of said casing and saidextensions of said walls, rear wall-portions spaced apart and arrangedat the op posite ends of said casing to close the rear of saidextensions, separated by a rear opening in said casing, and a door,swingably mounted at the rear of said casing, arranged to close theopening between said rear wallportions, and in combination with saidrear wall-portions, said extensions and cover,

when the latter is closed, forming a closed chamber for the movement ofthe typewriter-carriage.

13. In a casing for a typewriting machine, including a frame and akeyboard-extension, the ;ombination of a body-part and a cover, saidbody-part being provided with a front wall of unitary constructionhaving an opening below its top margin to permit the passage of thekeyboard-extension therethrough, end walls connected to said front wall,extending rearwardly and provided with outward laterally-extending,upper portions to permit the travel of a typewriter-carriage to itsextreme positions of movement, said casing having an open top and anopen back, a door to close the open ing in said back, a cover to closethe opening in said top, and a supporting axis 1nounted on the oppositeends of said casing and spanning the opening in the back, said door andsaid cover being swingably mounted on said axis, said cover beingarranged for opening to permit the insertion of said typewriting machineinto said casing through said top opening, and said door being swingablymounted to permit said typewriting machine to be installed in saidcasing, through said rear opening.

14. The combination of typewriting machine, a sound-proof cabinet inwhich the machine is fitted, said cabinet including a top cover and arear door hinged to each other for movement independently of each otherand of the cabinet, said cabinet having ends hinged to and closed bysaid cover, said ends including the side walls of the cabinet and alsoincluding the overhanging portions accommodating the travel of thecarriage of the typewriting machine.

JOHN lVALDHEIM.

Vitncsses EDITH B. LIBBEY, JENNIE P. THORNE.

